Double-action press.



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, DOUBLE ACTION PRESS.

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JOHN J'. RIGBY, OF NEW YORK, N. Y., ASSIGNOR TO E. W. BLISS COMPANY, A CORPORATION OF WEST VIRGINIA.

' DOUBLE-ACTION PRESS.

Specication of Letters Patent.

Patented July 16, 1907.

Application filed J' uly 30,1904. Serial No. 218,927.

To all whom it 'may concern:

Be it known that I, JOHN J. RIGBY, a citizen of the United States of America, and a resident of New York, borough of Brooklyn, county of Kings, and State of New York, have invented certain new and useiul Improvements in Double-Action Presses, of which the following is a specification.

My invention has reference to double action presses, and relates more particularly to a press for cutting and drawing a blank of sheet material into a cap for bottles or other containing vessels and for pressingv screw threads into the downwardly projecting flange of the cap, all in one Operation. Heretofore two separate machines have been necessary to perform these operations, one for cutting and drawing the blank, and the other for forming it with screw threads.

My machine contemplates theconstruction of'4 a press, or machine in which a sheet of material is cut, drawn and provided with screw threads on the downwardly projecting iiange in a single operation.

In the present instance, I have shown my invention applied to a press for making caps for bottles or other containing vessels, but it is obvious that the structure may be used for other purposes than the one stated above. l

The particular description whiclriollows will disclose the novel features of construction and combinations of parts comprising my invention.

In the drawings: Figure 1 is a general view of a double action press of a well known type, showing my invention applied to the same. Fig. 2 is a sectional view through the die, punch and blank holder, showing the press in its open position. Fig. 3 shows the development of the blank. Fig. 4 is a view similar to Fig. 2. with the parts in their closed position. Fig. 5 is a view in section on the irregular line 5--5 of Fig. 4. Fig. 6 is a detail view of part of the means for expand ing the chuck of the punch; Fig. 7 is a detail view of the means for moving the vertically movable ring oi the die down.

Similar characters of reference indicate corresponding parts in the dilerent views 1 indicates a framework of any suitable construction lor properly supporting the various parts comprising the machine.

2 is the die member and 3 denotes the punch,whi1e 4 is the blank holder. The die is composed of an upper stationary ring 5 having the cutting 'edge 6 and the drawing up portion 7, constituting, in connection with the punch and blank holder, means for cutting and dmwing up the blank in the lusual way. The said die is further provided with a lower expansible and vertically lmovable split ring 8 having an internal threaded surface 9. This ring is supported by another split ring 10 carried by the uprights 11 which are vertically movable, and connected to the link 12, which, in turn, is attached to the pivoted rod 13 carried by the member 14. A spring 15 normally tends to' keep the uprights 11 and consequently the lower expnnsible ring 8 in theiruppermost positions. The ring 8 is moved downward, in this instance, by means of the blank holder, through the instrumentality oi the plunger 16, bearing vagainst the pivoted member 13. When the blank holder descends. the plunger lcoming in contact with 'the pivoted'memberlB will move vthe ring 8 downward, and this latter being provided with'the lower inclined surface lengaging with the opposed inclined surfaces 18 on the stationary ring 19 in the bottom of the die will not only cause the said ring 8 to move downwards but also to become contracted by reason of the said opposed inclined surfaces.

Between the upper stationary ring and the lower expansible and vertically movable ring is an intermediate ring 20 stationarily located below the ring 5 and of a slightly greater diameter than that of the said ring 5. This ring 20 is provided with an inclined surface 2l which, upon coming in contact with the upper inclined surface 22 of the ring 8 will expand the same as it rises.

l23 is a knock out pad and is normallyheld in itsuppermost position by means of the spring 24 so that as the punch rises the said 'knock out pad will lift the finished article and allow it to drop out through the ejection port 25 by gravity, inasmuch as the press is generally mounted slantingly on the framework. f

. The vpunch is provided with a head26 adapted to yield when drawing the blank, so that a `motion of about Vone-half an inch is lost during the drawingup of the blank. This head 26 is moved with the member 27 by means of the screw 28 entering the core 29, .the said screw 28 playing in the slot 30 so as to permit its yielding motion. A spring 31 normally tends to keep the head 26 in its lowermost position with regard to the member 27 of the punch.

The head 26 is provided at its lowermost end with an expansible chuck 32, threaded on its external surface and provided with a central tapering aperture 33. yThis chuck 32 is split into a number of parts like the split rings in the die, and is normally held in its contracted position by means of the spring 34, resting` in the groove 35. The core 29 tapers at its lower end, and is suspended from the member 27 by two toggles 36 which are normallybent into a contracted position by means of the spring 37, interposed between the two toggles. Mounted on the blank holder are two inclined projections 38 which, when the punch descends, straighten the toggles 36 thereby moving the tapering core downward and expending the chuck 32. The blank holder is operated in this instance from the shaft 39 by means of the rollers 40 and cams 41, and slides in the ways 42. The punch is conveniently operated from the same shaft by means of the crank pin 43 and slides in the ways 44.

A sheet of material is fed to the machine in any suitable way, whereupon the blank holder descends and cuts the blank and in addition thereto moves down the lower expansible and vertically movable ring 8 which latter', in turn, depresses the knock out pad and is contracted by coming in contact with the inclined surface 18. Then it dwells, and the punch descends forcing the blank into the drawing up portion 7 thereby drawing up the blank, and while so doing, the head of the punch yields and loses a motion, in this case, of onehalf of an inch. The continued motion of the punch moves the blank which isnow drawn up, into theintermediate stationary ring 20. This ring being of a diameter somewhat greater than the drawing up ring will f tree the punch and blank from the jammed position occupied in the drawing up ring, and will allow the head of the punch to make up the lost motion, by dropping down, carrying the blank with it, in addition to its regular continued motion. tact with the projections 38 of the blank holder thereby moving down the core 29 and expanding the chuck 32.

out through the port 25.

What I claim is:

1. In a double action press, the combination with a die, comprising in part: an upper stationary ring and a lower vertically movable expansible ring internally threaded, of a blank holder, and a punch having an cxpansible chuck externally threaded for coperating with the die` with a die. and a lower vertically 5. In a double action press, the combination with a die, of an upper stationary ring, a lower expansible and vertically movable ring internally threaded, means for The toggles 36 now come in con` punch, an expansible chuck, carried by of an upper normally holding the vertically movable ring in its uppermost and expanded position, a blank holder, means operated by the`descent of the blank holder for moving the vertically movable ring down thereby contracting the same, a Apunch, a head on the said punch adapted to yield on the draw, an expansible chuck carried by the said head, normally in its contracted position and externally threaded, and means for expanding 6. In a double action press, the combination with a die, stationary ring, a lower expanslble and vertically movable ring internally threaded and having an upper and a lower inclined surface, an intermediate vertically movable ring a ring located in the bottom of the die having an inclined surface for contracting the vertically movable ring position, means for normally holding the vertically movable rim: in its uppermost position, operated by the descent of the the vertically movable rim.: down.

thc draw. an expunslblc chuck carried by the sold head normally in its contracted position and externally threaded, and means for expanding the chuck subsequently to the drawini,r operation of the punch.

T. In a double action press, the combination with a die, comprising in part: an upper stationary ring and a lower vertically movable and expansible ring, of a blank holder. and a punch having an expansibe chuck for coiiperating with the die.

B. In a double action press, the combination with a die, of an upper' stationary ring. and a lower vertically the said die, a blank holder, means for moving the lower ring ot the die downwards and contracting it as the blank holdei' descends, a the said punch, and means for expanding the said chuck as the punch descends.

9. In a double action press, the combination with a die. stationary ring, a lower expansible and vertically movable ring, means for normally holding the vertically movable ring in its uppermost and expanded position. a blank holder` menus operated by the descent of the blank holder for movim.: the vertically movable ring down thereby contracting the same, a punch. :l hcad on the said punch udapicd to yicld on thc draw.

l0. In a double action prcss, the combination with a dic. lower expansiblc and inclined surface, an intermediate stationary ring ot' a greater diameter than the upper ring, having an inclined surface for ezcpandinhnr the lower vertically movable ring;` when ln its uppermost position, a ring located in the -bottom of the die having an inclined surface` for conmovable ring when in its lowermost. position, means for normally holding the vertically movtracting theV vertically holder, means operated by the descent of the blank holder for moving the vertically movable ring down, a punch. a head ou the said punch adapted to yield on the draw, an ex- JOHN J. RIGBY. Witnesses z ARTHUR D. SHINER, Criss. Fnarsenusn. 

